CN113137201B - Chemical method repairing device and method for petroleum casing pipe - Google Patents
Chemical method repairing device and method for petroleum casing pipe Download PDFInfo
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- CN113137201B CN113137201B CN202110473575.5A CN202110473575A CN113137201B CN 113137201 B CN113137201 B CN 113137201B CN 202110473575 A CN202110473575 A CN 202110473575A CN 113137201 B CN113137201 B CN 113137201B
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- sealing plate
- damaged part
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 239000003208 petroleum Substances 0.000 title claims abstract description 30
- 239000000126 substance Substances 0.000 title claims abstract description 30
- 238000006243 chemical reaction Methods 0.000 claims abstract description 68
- 238000007789 sealing Methods 0.000 claims abstract description 56
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 36
- 239000000376 reactant Substances 0.000 claims abstract description 22
- 239000002981 blocking agent Substances 0.000 claims abstract description 12
- 239000011241 protective layer Substances 0.000 claims abstract description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 12
- 239000001301 oxygen Substances 0.000 claims description 12
- 229910052760 oxygen Inorganic materials 0.000 claims description 12
- 239000003832 thermite Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 5
- 239000000155 melt Substances 0.000 claims description 5
- 229920005989 resin Polymers 0.000 claims description 5
- 239000011347 resin Substances 0.000 claims description 5
- 239000000565 sealant Substances 0.000 claims description 5
- 239000005011 phenolic resin Substances 0.000 claims description 4
- 239000012466 permeate Substances 0.000 claims description 3
- 239000004014 plasticizer Substances 0.000 claims description 3
- 239000012744 reinforcing agent Substances 0.000 claims description 3
- 229920001187 thermosetting polymer Polymers 0.000 claims description 3
- 230000002209 hydrophobic effect Effects 0.000 claims description 2
- 150000002989 phenols Chemical class 0.000 claims 1
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 238000002485 combustion reaction Methods 0.000 description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 6
- 239000004568 cement Substances 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 5
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 5
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000003129 oil well Substances 0.000 description 4
- 238000002791 soaking Methods 0.000 description 4
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 238000002386 leaching Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 230000035484 reaction time Effects 0.000 description 3
- 235000010344 sodium nitrate Nutrition 0.000 description 3
- 239000004317 sodium nitrate Substances 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 2
- 229920001568 phenolic resin Polymers 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000007133 aluminothermic reaction Methods 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B29/00—Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
- E21B29/10—Reconditioning of well casings, e.g. straightening
Abstract
The invention discloses a chemical method repair device and a chemical method repair method for petroleum casings, wherein the device comprises a telescopic rod and a sealing bottom plate, a chemical reaction box with an opening at the side edge is arranged on the sealing bottom plate, the opening corresponds to a damaged position of a casing, a fusible sealing plate which can be fused along with chemical reaction is arranged at the opening at the side edge of the chemical reaction box, the chemical reaction box is connected with a trigger for triggering the chemical reaction, and the fusible sealing plate enters the damaged position of the casing after being fused. The method comprises the steps of extending the device into a sleeve, enabling a fusible sealing plate to correspond to a damaged position of the sleeve, and injecting a plugging agent between the fusible sealing plate and the damaged position to enable the plugging agent to cover the damaged position; triggering a chemical reactant to carry out chemical reaction, melting the fusible sealing plate by the generated heat, and enabling the plugging agent to penetrate into the damaged part for repairing; the generated melt forms a protective layer on the surface of the blocking agent. The repair firmness of the invention is greatly increased, and the invention can realize rapid repair and improve the repair efficiency.
Description
Technical Field
The invention relates to a petroleum pipe repairing device and a petroleum pipe repairing method, in particular to a petroleum casing pipe chemical method repairing device and a petroleum casing pipe chemical method repairing method.
Background
The petroleum casing is a steel pipe used for supporting the wall of a well of an oil well or a gas well so as to ensure the normal operation of the whole oil well after the drilling process and the completion. Each well uses several layers of casing depending on the drilling depth and geological conditions. After the casing is put into the well, cement is adopted for cementing the well, and the casing is different from an oil pipe and a drill rod, cannot be reused and belongs to a disposable consumption material, so that the consumption of the casing accounts for more than 70 percent of the total oil well pipe.
The existing petroleum casing pipe repairing method comprises the following steps of 1, cement paste extruding; the method is suitable for the situations of low oil layer pressure and no serious rupture and leakage; the disadvantages are that: when acidizing operation is needed on site, acid liquor reacts with cement due to the fact that the cement is alkaline, and therefore repaired leaks can leak out again. 2. Replacing the sleeve; the device is suitable for the situation that the fracture position is at the upper part of an oil well, and the casing above the fracture can be taken out in a reversed manner; the sleeve above the accident section can be lifted out by using an inverse buckling method, a new sleeve is put in again, and then the sleeve is well buckled; the method has the disadvantages that: the casing thread is not easy to screw down underground, the firmness is not high, and the construction cost is high; 3. a patch method; namely, a layer of thin-wall pipe is pasted on the inner wall of the damaged sleeve pipe to achieve the aim of repairing, and the method is suitable for the conditions of damage and leakage of the oil-water well caused by corrosion and has the defects that: can not effectively inhibit the later-stage continuous corrosion and achieve the complete restoration.
The existing chemical method repairing device can fill up the damaged part through molten iron and aluminum oxide generated by aluminothermic reaction, and although the problem of secondary damage caused by the reaction of cement and acid liquor can be avoided, the device only depends on the molten iron and the aluminum oxide to repair the leak, so that the firmness is not high, and the problem that the repaired leak leaks out again can be still faced.
Disclosure of Invention
The invention aims to: the first purpose of the invention is to provide a chemical method repairing device for petroleum casing pipes, which has higher firmness and higher repairing efficiency;
the second purpose of the invention is to provide a method for repairing the petroleum casing pipe chemical method repairing device.
The technical scheme is as follows: the chemical method repairing device for the petroleum casing comprises a telescopic rod extending into the casing, and a sealing bottom plate which is abutted against the inner wall of the casing and used for fixing the telescopic rod, wherein a chemical reaction box with an opening at one side is arranged on the sealing bottom plate, the opening corresponds to the damaged part of the casing, a fusible sealing plate which can be fused along with the chemical reaction is arranged at the opening at one side of the chemical reaction box, the chemical reaction box is connected with a trigger for triggering the chemical reaction, and the fusible sealing plate enters the damaged part of the casing after being fused.
Preferably, a sealant is provided between the fusible sealing plate and the breakage.
Preferably, the trigger comprises an oxygen supply pipe communicated with the chemical reaction box and used for supplying oxygen to the chemical reaction box.
Preferably, the trigger includes an ignition tube in communication with the chemical reaction chamber for igniting the chemical reactant.
Preferably, the size of the telescopic rod and the sealing bottom plate can be adjusted according to the size of the sleeve. The bottom surface of telescopic link (2) is provided with the screw thread, the surface of sealing bottom plate (3) is provided with the screw hole of size of a dimension and telescopic link (2) size of a dimension looks adaptation, the radius of sealing bottom plate (3) also can set up to different models according to the bore of oil casing (1). The surface of the telescopic rod (2) is provided with a graduated scale. The size of the chemical reaction box can be selected according to the size of a damaged part, and the caliber of the chemical reaction box needs to be larger than the size of the damaged part.
A method for repairing a casing by using a petroleum casing chemical method repairing device comprises the following steps:
(A) The chemical method repairing device is stretched into the sleeve, so that a fusible sealing plate on the side of the chemical reaction box corresponds to the damaged position of the sleeve, and a plugging agent is injected between the fusible sealing plate and the damaged position to cover the damaged position with the plugging agent;
(B) Triggering a chemical reactant in the chemical reaction box to carry out chemical reaction, wherein heat generated by the chemical reaction melts the fusible sealing plate and enables the plugging agent to penetrate into the damaged part for repairing; the melt produced by the chemical reaction forms a protective layer on the surface of the blocking agent.
Preferably, in step (B), the chemical reaction occurring in the chemical reaction chamber is a thermite reaction; the step of triggering the chemical reaction of the chemical reactant in the chemical reaction box comprises the following steps: introducing oxygen into the chemical reaction box, and igniting reactants; and the pressure generated after the chemical reaction pushes the fusible sealing plate to extrude the plugging agent. The chemical reactant is an aluminothermic reactant which is a compound of aluminum powder and ferric oxide, and a small amount of ferrosilicon powder and sodium nitrate are mixed in the aluminothermic reactant.
Preferably, in the step (a), a telescopic rod in the chemical remediation device is inserted into the casing pipe, and the chemical reaction box is fixed to the damaged part of the casing pipe by using a sealing plate at the tail end of the telescopic rod.
Preferably, in the step (A), the blocking agent is a thermosetting phenolic resin condensate and/or an epoxy modified phenolic resin condensate;
the blocking agent comprises at least one of resin, a curing agent, an accelerator, a plasticizer and a reinforcing agent; the controllable reaction time of the plugging agent is controlled to be 4-8h, the tensile strength of the plugging agent after curing is more than or equal to 15MPa, and the compressive strength of the plugging agent after curing is more than or equal to 20MPa;
the plugging agent is respectively soaked in acid liquor, alkali liquor and salt liquor, and the dissolution rates of the plugging agent after soaking are respectively 0.24-0.33%, 0.19-0.43% and 0.17-0.28%.
Has the advantages that: compared with the prior art, the invention has the following remarkable effects: 1. the damaged part is repaired by the fused product in the chemical reaction device and the fused material of the fusible sealing plate together, so that the repair firmness is greatly increased, the heat generated by the original chemical reaction device is fully utilized, the rapid repair is realized, and the repair efficiency is improved; 2. the sealant is injected between the fusible sealing plate and the damaged part, firstly, the sealing effect of the sealant on the damaged part is stronger, secondly, the bonding degree of the sealant and the damaged part is stronger after the fusible sealing plate is melted, and meanwhile, a protective layer is formed on the surface of the plugging agent by a melt generated by chemical reaction, so that the repair firmness of the damaged part is further enhanced; 3. the invention not only can block leakage, but also avoids the problems of continuous corrosion and perforation caused by water quality and the like, thereby really realizing thorough repair; 4. the similar adhesion principle is used for repairing, and the compression resistance and the tensile resistance of the cured repairing position are enhanced; the casing pipe patching method adopts a mechanical method to deform and expand the patching pipe for repairing, and the patching pipe deforms under pressure, so that the mechanical stress is greatly reduced, and later-period leakage is easy to cause, therefore, the validity period of the invention is greatly improved.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings.
As shown in figure 1, the invention discloses a chemical method repairing device for an oil casing 1, which comprises an expansion link 2 extending into the casing 1, wherein a sealing bottom plate 3 which is abutted against the inner wall of the casing 1 and used for fixing the expansion link 2 is fixed at the tail end of the expansion link 2, and the sizes of the expansion link 2 and the sealing bottom plate 3 can be adjusted according to the size of the casing 1. A chemical reaction box with an opening at the side edge is arranged on the sealing bottom plate 3, the opening corresponds to the damaged part of the sleeve, the chemical reaction box is connected with a trigger for triggering chemical reaction, the trigger comprises an oxygen supply pipe 8 which is communicated with the chemical reaction box and supplies oxygen to the chemical reaction box, and an ignition pipe 7 which is communicated with the chemical reaction box and is used for igniting chemical reactants, the outer wall of the telescopic rod 2 is provided with a fixing frame 9, and the ignition pipe 7 and the oxygen supply pipe 8 are inserted into the petroleum sleeve 1 together with the sealing bottom plate 3 by the fixing frame 9; a fusible sealing plate 6 which can be fused along with the chemical reaction is arranged at the opening of the side edge of the chemical reaction box, and the fusible sealing plate 6 enters the position to be repaired of the sleeve 1 after being fused.
The bottom end surface of the telescopic rod 2 is provided with threads, the surface of the sealing bottom plate 3 is provided with threaded holes with sizes matched with those of the telescopic rod 2, the radius of the sealing bottom plate 3 can be set to be different types according to the caliber of the petroleum casing pipe 1, and the sealing bottom plate 3 can be designed to be used for the petroleum casing pipes 1 with different calibers in different sizes through the detachable structures of the telescopic rod 2 and the sealing bottom plate 3, so that the use convenience is improved; the surface of telescopic link 2 is provided with the scale, and through the scale that 2 surfaces of telescopic link set up, can make the depth that sealed bottom plate 3 inserted in oil casing 1 by the accurate calculation, further improve the prosthetic integrality to damaged 11 department.
The chemical reaction case is combustion chamber 4, and the size of combustion chamber 4 can be selected according to the size of damage department 11, and the bore size of combustion chamber 4 needs to be greater than the size of damage department 11. When the sealing agent is used, the sealing agent 10 is injected between the fusible sealing plate and the damaged part, and the size of the combustion chamber 4 is larger than that of the damaged part 11, so that the sealing agent 10 can completely cover the surface of the damaged part 11 when filled between the combustion chamber 4 and the damaged part 11, and the integrity and the stability of repairing gaps and holes in the damaged part 11 are improved. The combustion chamber 4 is filled with thermite reactant 5 to generate thermite reaction.
The invention discloses a method for chemically repairing a device of a petroleum casing pipe, which comprises the following steps:
(1) Determining a damaged part 11 inside the petroleum casing 1 through a detecting instrument for logging, measuring the depth of the damaged part 11 inside the petroleum casing 1, installing a proper telescopic rod 2 and a proper sealing bottom plate 3 according to the caliber of the petroleum casing 1, and inserting a combustion chamber 4 below the damaged part 11 inside the petroleum casing 1 through the sealing bottom plate 3;
(2) Before the combustion chamber 4 is inserted into the petroleum casing 1, the interior of the combustion chamber is filled with thermite reactant 5, and the opening of the combustion chamber 4 is sealed with the thermite reactant 5 through a sealing plate 6;
(3) When the combustion chamber 4 is positioned below the damaged part 11 in the petroleum casing 1, injecting a plugging agent 10 between the inner wall of the petroleum casing 1 and the sealing plate 6 until the plugging agent 10 completely covers the surface of the damaged part 11, further enabling the plugging agent 10 to penetrate into a damaged gap in the damaged part 11, and inserting the ignition tube 7 and the oxygen supply tube 8 into the petroleum casing 1 together with the sealing bottom plate 3 through the fixing frame 9;
(4) The thermit reactant 5 is heated through the ignition pipe 7, meanwhile, the oxygen supply pipe 8 supplies oxygen to the interior of the combustion chamber 4 until the thermit reactant 5 is ignited, thermit reaction is generated through combustion of the thermit reactant 5, heat generated in the reaction process accelerates the solidification speed of the plugging agent 10, molten iron and aluminum oxide are generated in the thermit reaction process, and the sealing plate 6 is pushed to slide and extrude the plugging agent 10 through the volume generated in the combustion chamber 4 by the molten iron and the aluminum oxide, so that the plugging agent 10 can better permeate into gaps in the damaged part 11, and the repair efficiency and the repair effect of the damaged part 11 are improved; in addition, in the process of thermite reaction of the thermite reactant 5, the sealing plate 6 is gradually melted, so that after the blocking agent 10 permeates into the damaged part 11 to be repaired, iron and aluminum oxide in a molten state generated in the process of thermite reaction form a protective layer on the surface of the damaged part 11;
(5) After the repair of the damaged part 11 is completed, the combustion chamber 4 and the sealing bottom plate 3 are taken out again through the telescopic rod 2, and the sealing bottom plate 3 can eradicate the redundant plugging agent 10 on the surface of the damaged part 11 in the ascending process.
In the step (2), the thermite reactant 5 is a compound of aluminum powder and ferric oxide, a small amount of ferrosilicon powder and sodium nitrate are mixed in the thermite reactant 5, the action can be eased by adding the ferrosilicon powder, the action time can be prolonged, and the sodium nitrate is a strong oxidant;
the blocking agent 10 takes hydrophobic resin consisting of a thermosetting phenolic resin condensation compound and an epoxy modified phenolic resin condensation compound as a main material, when the blocking agent 10 is used, according to different oil reservoir temperature conditions, materials such as unsaturated resin, a curing agent, an accelerator, a plasticizer, a reinforcing agent and the like are added according to a certain proportion so as to obtain controllable reaction time meeting the requirements of site construction and mechanical properties after curing, the controllable reaction time of the blocking agent 10 is controlled to be 4-8h, the tensile strength of the blocking agent 10 after curing is more than or equal to 15MPa, the tensile strength is executed GB/T1701-2001, the compressive strength of the blocking agent 10 after curing is more than or equal to 2OMPa, and GB2438-81 is executed; the plugging agent 10 was placed in a plugging agent 10% hc1, plugging agent 10% naoh and plugging agent 10% nacl solution and the test dissolution rates were: the acid soaking leaching loss rate is 0.24-0.33%, the alkali soaking leaching loss rate is 0.19-0.43%, the salt soaking leaching loss rate is 0.17-0.28%, and the plugging agent 10 is more balanced in comprehensive mechanical properties, has good chemical stability and improves the repairing effect.
Claims (4)
1. A chemical method repairing device for petroleum casing pipes comprises a telescopic rod (2) extending into a casing pipe (1) and a sealing bottom plate (3) abutted to the inner wall of the casing pipe (1) and used for fixing the telescopic rod (2), and is characterized in that a chemical reaction box with an opening at one side is arranged on the sealing bottom plate (3), the opening corresponds to a damaged part (11) of the casing pipe (1), a fusible sealing plate (6) which can be fused along with chemical reaction is arranged at the opening at one side of the chemical reaction box, the chemical reaction box is connected with a trigger for triggering the chemical reaction, and the fusible sealing plate (6) enters the damaged part (11) of the casing pipe (1) after being fused;
a sealant is arranged between the fusible sealing plate (6) and the damaged part (11); the trigger comprises an oxygen supply pipe (8) which is communicated with the chemical reaction box and supplies oxygen to the chemical reaction box; the trigger comprises an ignition tube (7) communicated with the chemical reaction box and used for igniting chemical reactants;
the method for repairing the casing by using the chemical method repairing device for the petroleum casing comprises the following steps:
(A) The chemical method repairing device is stretched into the sleeve (1), the fusible sealing plate (6) on the side of the chemical reaction box corresponds to the damaged part (11) of the sleeve (1), and the plugging agent (10) is injected between the fusible sealing plate (6) and the damaged part (11) to enable the plugging agent (10) to cover the damaged part (11);
(B) Triggering a chemical reactant in the chemical reaction box to carry out chemical reaction, wherein heat generated by the chemical reaction melts the fusible sealing plate (6), and the plugging agent (10) is made to permeate into the damaged part (11) for repair; forming a protective layer on the surface of the blocking agent (10) by a melt generated by the chemical reaction;
in the step (B), the chemical reaction in the chemical reaction box is a thermite reaction; and the pressure generated after the chemical reaction pushes the fusible sealing plate (6) to extrude the plugging agent (10).
2. The chemical petroleum casing pipe rehabilitation device according to claim 1, wherein in the step (B), the step of triggering the chemical reaction of the chemical reactant in the chemical reaction tank comprises: and introducing oxygen into the chemical reaction box, and igniting the reactant.
3. The chemical petroleum casing restoration device according to claim 1, wherein in the step (a), the blocking agent (10) comprises a hydrophobic resin composed of a thermosetting phenol resin condensate and an epoxy-modified phenol resin condensate as a main material.
4. The chemical petroleum casing pipe repair device according to claim 1, wherein in step (a), the plugging agent (10) comprises at least one of a resin, a curing agent, an accelerator, a plasticizer and a reinforcing agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110473575.5A CN113137201B (en) | 2021-04-29 | 2021-04-29 | Chemical method repairing device and method for petroleum casing pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110473575.5A CN113137201B (en) | 2021-04-29 | 2021-04-29 | Chemical method repairing device and method for petroleum casing pipe |
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| CN113137201B true CN113137201B (en) | 2023-01-24 |
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Effective date of registration: 20240129 Address after: No. 375 Zhencheng Road, Jiangyin City, Wuxi City, Jiangsu Province, China Patentee after: Jiangsu Xinchangjiang seamless steel pipe manufacturing Co.,Ltd. Country or region after: China Address before: No. 199, Huayang West Road, Hanjiang District, Yangzhou City, Jiangsu Province Patentee before: YANGZHOU POLYTECHNIC INSTITUTE Country or region before: China |